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United States Patent | 5,665,237 |
Kozak ,   et al. | * September 9, 1997 |
A process for the separation of naphthalenesulfonate-based carbonyl condensates from water is provided. The process comprises contacting a mixture comprised of water and a naphthalenesulfonate-based carbonyl condensate (preferably a material selected from the group consisting of formaldehyde condensates of naphthalenesulfonic acids, formaldehyde condensates of lower-alkyl substituted naphthalenesulfonic acids, and mixtures of two or more of such materials) with a liquid organic phase comprised of a cationic lipophilic amine to form an aqueous phase depleted with respect to said mixture of naphthalenesulfonate-based carbonyl condensate and a liquid organic phase enriched in naphthalenesulfonate-based carbonyl condensate. The process further comprises separating said aqueous phase depleted with respect to said minute of naphthalenesulfonate-based carbonyl condensate and said liquid organic phase enriched with respect to naphthalenesulfonate-based carbonyl condensate. The liquid organic phase can then be stripped with an alkaline stripping solution to regenerate the cationic lipophilic amine.
Inventors: | Kozak; William G. (Hatfield, PA); Chovatia; Dharmesh (Bensalem, PA); Smith; George A. (Newtown, PA) |
Assignee: | Henkel Corporation (Plymouth Meeting, PA) |
[*] Notice: | The portion of the term of this patent subsequent to August 8, 2014 has been disclaimed. |
Appl. No.: | 395738 |
Filed: | February 28, 1995 |
Current U.S. Class: | 210/638; 210/634 |
Intern'l Class: | B01D 011/04 |
Field of Search: | 210/634,638,511 562/89,96 |
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